WAVELENGTH CONVERTING MATERIAL FOR LIGHT EMITTING DEVICE

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PROBLEM TO BE SOLVED : To provide a wavelength converting material for a light emitting device. SOLUTION : A wavelength converting material for a light emitting device according to the present invention is a wavelength converting material defined by AE3-x1-y+zRE3-x2+y-z[Si9-wAlw(N1-yCy)[4](N16-z-wOz+w)[2]] : Eux1, Cex2, where (AE=Ca, Sr, Ba; RE=Y, Lu, La, Sc; 0≤x1≤0.18; 0≤x2≤0.2; x1+x2>0; 0≤y≤1; 0≤z≤3; 0≤w≤3), where the wavelength converting material has a cubic crystal structure and an average effective ionic radius for AE+RE is 120 pm or less. SELECTED DRAWING : Figure 1 COPYRIGHT : (C)2018, JPO&INPIT